WebPageTest

green-watch.org · 05-11-2010, 04:45 AM

Hey there,

It took me a few days to figure out how to GZIP coldfusion (.cfm) files while making sure keep-alives were enabled.

I across the following article describing how to make HTTP KeepAlives and Coldfusion Servers work together:

http://www.cisco.com/en/US/products/hw/c...409d.shtml

The line that lead me to a solution was packets need to contain a content-length value. So here is my solution to getting coldfusion (.cfm) files GZIPPED and Keep-Alives enabled:

Code:

<cfscript>

function HtmlCompressFormat(sInput)

{

    var level = 2;

    if( arrayLen( arguments ) GTE 2 AND isNumeric(arguments[2]))

    {

        level = arguments[2];

    }

    sInput = trim(sInput);

    switch(level)

    {

        case "3":

        {    

            sInput = reReplace( sInput, "[[:space:]]{2,}", " ", "all" );

            sInput = replace( sInput, "> <", "><", "all" );

            sInput = reReplace( sInput, "<!--[^>]+>", "", "all" );

            break;

        }

        case "2":

        {

            sInput = reReplace( sInput, "[[:space:]]{2,}", chr( 13 ), "all" );

            break;

        }

        case "1":

        {

            sInput = reReplace( sInput, "(" & chr( 10 ) & "|" & chr( 13 ) & ")+[[:space:]]{2,}", chr( 13 ), "all" );

            break;

        }

    }

    return sInput;

}

</cfscript>

<cfsavecontent variable = "raw">

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Untitled Document</title>

</head>

<body>

</body>

</html>

</cfsavecontent>

<cfif cgi.HTTP_ACCEPT_ENCODING contains "gzip"> 

  <cfset raw = #htmlCompressFormat(raw, 2)#>

  <cfscript>

  fileOut = createobject("java", "java.io.ByteArrayOutputStream").init();

  out = createobject("java","java.util.zip.GZIPOutputStream").init(fileOut);

  out.write(raw.getBytes(), 0, len(raw.getBytes()));

  out.finish();

  out.close();

  </cfscript>

  <cfheader name="Content-Encoding" value="gzip">

  <cfheader name="Content-Length" value="#len(fileOut.toByteArray())#">

  <cfcontent type="text/html; charset=utf-8" reset="true" variable="#fileOut.toByteArray()#">  

<cfelse>

  <cfoutput>#htmlCompressFormat(raw, 2)#</cfoutput>

</cfif>

I hope this comes in handy for other coldfusion developers working on page speed issues.

Sincerely,
Travis Walters

05-28-2010, 01:19 AM

Thx for the tut, mate Smile

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coldblooded1 · 05-31-2010, 02:45 AM

great tut! helped me a lot Smile

thanks.

green-watch.org · 06-16-2010, 04:35 PM

Hey Guys,

Something else I recommend having in my script:

<cfheader name="Expires" value="#GetHttpTimeString(DateAdd('m', 1, Now()))#">

This helps caching a bit. You can set the time for whatever you want as long as it follows the produced output in the line above.

Sincerely,
Travis Walters